A printing apparatus includes a print head, a processor, and a drying mechanism. The print head ejects ink onto a printing medium located in a printing region to form an image. The processor is configured to control a duty that is an amount of ink ejected by the print head onto the printing medium per unit area. The drying mechanism includes a transport unit that transports the printing medium in a first direction and a heater that heats the printing medium. The drying mechanism is configured to dry the printing medium having the image formed thereon by the print head, by transporting, using the transport unit, the printing medium to a drying region in which the printing medium is dried by the heater. The processor controls drying of the printing medium performed by the drying mechanism in accordance with the duty.

An ink jet recording apparatus includes a line head including a region of nozzles that are formed in an intersecting direction intersecting a transport direction of a recording medium and eject an ink, the region covering a printing region of the recording medium in the intersecting direction, a drying unit that dries the recording medium, a transport unit that transports the recording medium, and a control unit. The ink contains colloidal silica, and the control unit controls the drying unit and the transport unit such that drying of the ink is started within 0.4 second after the ink is attached to the recording medium.

To provide a printing device that can carry out a temperature adjustment of air in a simple manner and also provide superior energy efficiency, the present invention relates to a printing device 100 that is constituted by a printing part 5, a first air heater part 6a and a second air heater part 6b, as well as a control part 4, and each of the first air heater part 6a and the second air heater part 6b is constituted by at least one or more air heaters 6, and the control part 4 carries out a first control in which the first air heater part 6a is turned ON, while the second air heater part 6b is simultaneously turned OFF and a second control in which the first air heater part 6a is turned OFF, while the second air heater part 6b is simultaneously turned ON, with the first control and the second control being alternately switched in each fixed period.

Circuits for controlling an impeller in a fluid flow distribution system to achieve a target fluid flow are disclosed. The circuit to output a signal representative of a speed value (N.sub.T) of the impeller derived from a stored power consumption value (W.sub.i) and speed value (N.sub.i) pairs to achieve the target fluid flow. The circuit to receive a power signal representative of an input power consumption value (W) of the impeller at the speed value (N.sub.T) to input fluid to the fluid flow distribution system and to compare the value (W) represented by a power signal for the speed value (N.sub.T) with the stored value (W.sub.i) and impeller speed value (N.sub.i) pairs to determine a least difference impeller speed value (N.sub.L) of the stored pair comprising a least difference between the value (W) and the value (W.sub.i). The circuit to output a speed signal representative of value (N.sub.L).

A recording method uses an ink composition containing a colorant, resin particles, an organic solvent and water, and an aggregating liquid containing a coagulant for aggregating components of the ink composition. The method includes adhering the aggregating liquid to a recording region of a recording medium; adhering the ink composition to the recording region by ejecting the ink composition from a recording head; and drying the recording region to which the aggregating liquid and the ink composition are adhered such that an amount of the organic solvent in the recording region is 2.0 mg/inch.sup.2 or less to obtain a recorded material.

A Web-Fed Inkjet Digital Printing Machine suitable for printing any kinds of Flexible substrates (materials), comprising of one or more printing stations wherein Web or Film path is brought vertically or angularly downwards at an angle between 10 to 175 from horizontal position or radially downwards at a radius of 5 millimeters to 4 meters after each colour or stage of printing. The Web or Film path can also be brought downwards first vertically or angularly and then radially or vice-versa, at angles between 10 to 175 and radius of 5 millimeters to 4 meters after each colour or stage of printing. The dryers are positioned on both or either sides and printheads are positioned along the Web or Film. An automatic control for guiding and tension control and pre-coater and post-coater for inline coating of the Web or Film is also available.

[Problem] To provide a printing device that can carry out a temperature adjustment of air in a simple manner and also provide superior energy efficiency.

[Solving Means]

The present invention relates to a printing device 100 that is constituted by a printing part 5, a first air heater part 6a and a second air heater part 6b, as well as a control part 4, and each of the first air heater part 6a and the second air heater part 6b is constituted by at least one or more air heaters 6, and the control part 4 carries out a first control in which the first air heater part 6a is turned ON, while the second air heater part 6b is simultaneously turned OFF and a second control in which the first air heater part 6a is turned OFF, while the second air heater part 6b is simultaneously turned ON, with the first control and the second control being alternately switched in each fixed period.

A drying device includes a drier, a gas circulator, and a concentration adjuster. The drier warms a liquid composition on a drying target object. The gas circulator circulates a gas containing a volatile component of an organic solvent warmed and volatilized by the drier to reuse the gas for drying. The concentration adjuster adjusts a concentration of the volatile component reused.

According to an example, a printing system may include printing components, an input voltage engine to determine whether an input voltage level is outside of a predetermined voltage level range, and a printing components engine to control the printing components to operate in one of a normal mode and a reduced throughput mode based upon whether the accessed input voltage level is outside of the predetermined voltage level range.

A dryer for drying a drying object includes a hot air generator to generate hot air to be blown onto the drying object, a contact heater to contact and heat the drying object, and a controller to control a heating temperature of the contact heater and a temperature of the hot air. The controller controls the heating temperature of the contact heater to be above a first predetermined temperature from a start of generation of the hot air by the hot air generator until the temperature of the hot air reaches a second predetermined temperature.